Deutz Fault Code
Free · no signupCode 6-1-1 / SPN 651 FMI 5
Dead Misfire Cylinder 1 / Engine Shake
System
Fuel System
Symptom
Dead Misfire Cylinder 1 / Engine Shake
Diagnosis & fix steps
LOGIC: Unit Pump / Injector Solenoid Cylinder 1 Open Circuit.
ACTION: Measure Cylinder 1 unit pump solenoid coil resistance (~0.5–1.2Ω spec). Inspect harness leads and pass-through connector pins at the pump housing.
Red Seal field insights
Current Loop: Zero current flow detected across Cylinder 1 driver line indicates a broken wire filament, loose connector, or open solenoid coil.
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